Electric stop-motion for warping-machines.



No. 894,283. PATENTED JULY 28,1908.

F. OTT. I ELECTRIC STOP MOTION FOR WARPING MACHINES.

APPLICATION FILED MAY 9, 1907.

FIGH

=- s /26INVENTORI FEEDER/CK 077;"

WITNESSES;

operators.

FREDERICK OTT, OF SOUTH BETHLEHEM, PENNSYLVANIA.

ELECTRIC STOP-MOTION FOR WARPING-MACHINES.

Specification of Letters Patent.

' Patented July 28, 1908.

Application filed May 9, 1907. Serial No. 372,775.

To all whom it may concern:

Be it known that I, FREDERICK OTT, of South Bethlehem, in the county ofNorthampton and State of Pennsylvania, have invented certain new anduseful Improvements in Electric Stop-Motions for I/Varping- Machines,whereof the following is a speoifb cation, reference being had to theaccompanying drawings.

My invention relates to an improvement in electric s topmotions and inits present embodiment is shown as applied to a kreel used in connectionwith a warping machine, and is adapted for use with silk, cotton orwool.

The object of my invention is to provide means for quickly detectingbroken ends of threads and immediately stopping the machine. Heretoforeit has been common to have an end run from five to ten yards before theoperator discovered the breakage, and it was necessary in such case tounwind the yarn from the reel until the broken end was found, generallyrequiring the services of two In replacing this section or band of yarnback upon the reel it becomes uneven in tension as compared with theremainder of the reel, that is, it hardly ever is rewound with itsoriginal tension as received when put directly on the warping machinefrom the kreel. This uneven tension causes imperfect cloth to be woven.By the use of my invention this difficulty is overcome, since, as soonas a thread breaks the machine stops and no unwinding of the reel isnecessary in order to find the broken end.

In the accompanying drawings, Figure I, is a central vertical sectionthrough a kreel embodying my invention. Fig. II, is a front elevation ofthe same. Fig. III, is a partial plan view showing the manner in whichthe threads are crossed.

In said figures, the horizontal bar 1, is supported at each end by sideframes 2, 3. Above this bar is mounted the frame 5, holding the seriesof glass reeds 6, between which the warp threads are passed. Adjacentthe reed frame and forming a horizontal support for the threads as theycome from the bobbins is a glass rod 8. Secured to the bar 1, in anyapproved manner is a series of inclined rods 10, each having a row ofbobbins 12, mounted thereon. By thus mounting the bobbins upon theinclined rods, the threads may pass up vertically without encounteringany adjacent bobbin.

At the front of the kreel above the bar 1, is

mounted a horizontal bar 15, formed of wood or any other suitableinsulating material having a metal strip 16, embedded therein andextending the full width of the kreel. Below the bar 15, and parallelthereto is another bar 18, also of insulating material upon which ismounted the metal back 20, of a comb, comprising a series of wirefingers 22, each provided at its upper end with a porcelain tip 24,which affords a smooth surface for contact with the warp threads 26, astheypass from the bobbins to the warping machine.

The back 20, of the comb is held in position by two metal strips 28, and30, as clearly shown in Fig. I. The wires 22, may be secured to the back20, in any approved manner. Opposite the bar 15, and parallel therewithis a rod 32, extending across the kreel and forming a stop for the wires22, so that they may not become distorted when drawn awayfrom the strip16, by the crossed threads 26. The strip 16, and back of the comb 20,are connected to the wires 34, and 36, leading to a suitable source ofelectric energy in eluding in the circuit any desired form of 7 'fingers22, away from the strip 16, and pass on to the warping machine. It willbe obvious that if either one of a pair of these threads should becomebroken, the corresponding finger 22, would be released and spring intocontact with the strip 16, thus closing the electric circuit andenergizing the electric stop motion device to stop the machineimmediately.

, The vitreous tips 24, are more frictionless than the metal of whichthe finger is composed. By the arrangement described, the line conductoris in a plane other than that in which the threads move. Accordingly, itis possible to have the portion of the fingers which contact with thethreads made of or covered with non-metallic material more frictionlessthan the metal of which the fingers are composed (said material beingusually electrically non-conductive) and yet not interfere with theclosing .of the circuit when the thread breaks.

Having thus described my invention, 1 claim 1. In an electrical stopmotion for a Warping machine the combination of a series of pivotedmetallic fingers; a line conductor crossing the line of movement of thefingers; an electrical circuit including both said fingers and saidconductor; vitrified coatings extending over a portion of each of saidme tallic fingers but not over that portion of said fingers which iscapable of coming into contact With said line conductor, and guidingmeans for so guiding a plurality of crossed threads that at the point ofcrossing they sustain a finger at its vitrified portion and thus, solong as unbroken, maintain said finger from electrical contact with saidline conductor.

2. The combination With a Warping machine and a kreel therefor, havingaseries of spools mounted thereon; of a series of metal fingersconnected to a metal strip, said fingers being covered for a portion oftheir length With a vitreous surface for engagement With the threads fedfrom said spools; an electrical conductor included in a circuit andextending in juxtaposition to said fingers and adapted to be engaged bythe bare portion of said fingers, each of said fingers being held fromcontact With said conductor by a pair of crossed threads lying in asubstantially horizontal plane, fed from said spools, whereby When oneof a pair of threads breaks, or a loose end occurs, the correspondingfinger Will be free to close said circuit to control a stop motion forthe Warping machine.

3. The combination With a Warping machine and a kreel therefor having aseries of bobbins or spools mounted thereon; of a se ries of metalfingers secured to a metal strip,

each of said fingers being provided With a porcelain coating extendingover a portion of its length; an electrical conductor included in acircuit and extending in juxtaposition to said fingers; means forsupporting the threads passing from the spools so that they may engagethe coating 011 said fingers, each of said fingers being held fromcontact with said conductor by a pair of crossed threads lying in asubstantially horizontal plane fed from said spools, whereby When one ofapair of threads breaks, or a loose end occurs, the corresponding fingerwill be free to close said circuit to control a stop motion for theWarping machine.

4. In an electrical stop motion for a Warping machine, the combinationof guiding means for maintaining the threads as they pass from the kreelto the Warp beam in a substantially horizontal plane, and, at the sametime, permitting the crossing of said threads as desired Within saidplane; a series of vertical metallic fingers including a nonmetallicportion Which is more frictionless than the metal of Which the fingersare composed, pivoted so as to move substantially along the line inWhich said threads travel, and included Within an electric circuit, eachof said fingers being restrained by a pair of cross threads; a lineconductor crossing the line of movement of the fingers in a plane otherthan that in which the threads move, and also included in said circuit,whereby a different and more frictionless portion of each finger isengaged by the crossing threads from that Which, when a thread breaks,

